:scope {
  --nav-width: 256px;
  background: #f3f6f8;
  width: calc(100% - var(--nav-width));
  min-height: 100vh;
  margin: 0 0 0 var(--nav-width);
}

.title {
  text-align: center;
  margin: 24px 0 0 0;
  display: inline-block;
  width: 100%;
  color: rgba(0, 0, 0, .85);
}

.test-container {
  margin: auto;
  width: 70%;
  position: absolute;
  left: calc(50% + calc(var(--nav-width) / 2));
  top: 50%;
  transform: translateY(-50%) translateX(-50%);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.15), 0 2px 3px rgba(0, 0, 0, 0.2);
  border-radius: 3px;
  padding: 12px;
  min-height: 70vh;
  background: white;
}

.test-nav {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  box-sizing: border-box;
  width: var(--nav-width);
  padding: 32px;
  background: #e1e9ee;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.15);
}

.test-nav-item {
  color: green;
}